古突厥文的 ■ｒｉｎ■“大约是、感到是”为系动词■ｒ－“是”的动名词，它用于句末时，是以非确指的口气表达说话者主观的估计和感觉。在喀喇汗王朝文献中， ■ｒｉｎ■逐渐消失，部分地取代其作用的是由动词ｔｕｒ－“站、立”分化出的ｔｕｒｕｒ“存在、是、有”，它与原可作为系词的ｏｌ“是、存在”并存并用；在ａｒｉｎｃ已消失的察合台语中，ｔｕｒｕｒ及其变体 ｄｕｒ／ｔｕｒ等又逐渐取代ｏｌ，仍用于句末表非确指口气，有时带有疑惑口气。 Ancient Turks ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • In the Kala Khan literature, ■ rin ■ gradually disappear, partially replaced by its role turne “verb tur-” stand, “turur” differentiation is, there is, "and it can be used as a copula In the Chagatai language where arinc has vanished, turur and its variants such as dur / tur gradually replace ol and are still used at the end of the sentence to refer to the tone, sometimes with doubtful tones .